Words similar to duty

Example sentences for: duty

How can you use “duty” in a sentence? Here are some example sentences to help you improve your vocabulary:

that she had to put a suggested tip (as if I didn't know) and that she put it higher than normal (the service certainly was not above and beyond the call of duty) and that she further did not give the option of a lower tip.
2) It's our duty as the world's only superpower.
An inside story at the NYT says that the gay oriented magazine, The Advocate , reports that a gay Marine who was pseudonymously the subject of a NYT Sunday Magazine article last year appeared in several gay pornographic films while he was on active duty.
As in the analysis of the Heavy-Duty Engine/Diesel Fuel Rule (U.S.
Absence reports must be maintained daily to indicate those service members who are to be charged leave and those who are not present for duty but who should be.